作者机构：
[Cao, Li-Min; Xia, Nian-He] Chinese Acad Sci, Inst Econ Bot, S China Bot Garden, Guangzhou 510650, Peoples R China.;[Cao, Li-Min] Hengyang Normal Univ, Dept Life Sci, Hengyang 421008, Peoples R China.;[Cao, Li-Min] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.
通讯机构：
[Xia, Nian-He] C;Chinese Acad Sci, Inst Econ Bot, S China Bot Garden, Guangzhou 510650, Peoples R China.
摘要：
The floral organogenesis and development of Delavaya toxocarpa Franch. (Sapindaceae) were studied under scanning electron microscope and light microscope to determine its systematic position within Sapindaceae. Flowers arise in terminal thyrses. The sepal primordia initiate in a spiral (2/5) sequence, which are not synchronous. The five petal primordia initiate almost synchronously and alternate with sepal primordia. Eight stamens initiate almost simultaneously and their differentiation precedes that of the petals. The last formed petal and one stamen initiate from a common primordium. Mature stamens curve inwards and cover the ovary in bud. The gynoecium begins as a hemispheric primordium on which two carpellary lobes arise simultaneously. Later in development a single gynocium is formed with two locules and two ovules per locule. Floral morphology suggests a closer affinity with Sapindaceae, although certain features of floral ontogenesis are similar to those observed in certain members of the former Hippocastanaceae, such as Handeliodendron.
期刊：
Plant Systematics and Evolution,2008年274(1-2):17-23 ISSN：0378-2697
通讯作者：
Xia, N. H.
作者机构：
[Cao, L. M.; Xia, N. H.; Deng, Y. F.] Chinese Acad Sci, S China Bot Garden, Inst Econ Bot, Guangzhou 510650, Guangdong, Peoples R China.;[Cao, L. M.] Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China.;[Cao, L. M.] Hengyang Normal Univ, Dept Life Sci, Hengyang 421008, Hunan, Peoples R China.
通讯机构：
[Xia, N. H.] C;Chinese Acad Sci, S China Bot Garden, Inst Econ Bot, Guangzhou 510650, Guangdong, Peoples R China.
摘要：
Embryological characters of Handeliodendron bodinieri (Sapindaceae) are reported for the first time. Anthers are tetrasporangiate. Cytokinesis in microsporocyte meiosis is of the simultaneous type and the microspore tetrads are tetrahedral. The tapetum is secretory and parietal. Mature pollen is bicellular. The ovary is trilocular. There are two ovules in each locule. The placenta is axile. The ovule is crassinucellate, bitegmic and hemitropous, without hypostase when mature. The development of the embryo sac is of the Polygonum type. The systematic significance of the embryological characters of Handeliodendron bodinieri is discussed.
